Custom Gear Rack – Calculate the Module and Configure a Matching Rack Online

Configure a Custom Gear Rack Online

Gear racks convert rotary motion into precise linear motion. Together with a matching spur gear they form a reliable rack-and-pinion drive used in CNC machines, robotics, automation systems and many custom mechanical projects. With our online configurator you can create a gear rack with your own dimensions and download the STL file or order a professional 3D print.

Why Is the Module Important?

The most important parameter of a gear rack is the module. The gear rack and the mating spur gear must always use the same module. If the modules differ, the teeth will not mesh correctly, resulting in excessive wear or complete failure.

How to Calculate the Module

If you already have the matching spur gear, determining the correct module is straightforward. Measure the outside diameter of the gear, count the number of teeth and calculate the module using the standard formula for involute spur gears:

Module = Outside Diameter / (Number of Teeth + 2)

Once you know the module, simply enter the same value into the gear rack configurator.

For a detailed step-by-step guide, read our article: How to Measure a Gear – Calculate Module, Pitch Diameter and Number of Teeth.

Configurable Parameters

Module

The module defines the tooth size and must match the mating spur gear.

Length

Choose the exact rack length required for your machine or project.

Width and Height

Adjust the cross-section to achieve the required stiffness and load capacity.

Number of Teeth

Depending on the selected module and rack length, the gear rack can be configured for your specific application.

Typical Applications

• Rack and pinion drives
• CNC machines
• 3D printers
• Industrial automation
• Robotics
• Sliding mechanisms
• Linear positioning systems
• Custom machinery

Why Use a Parametric Gear Rack?

Standard gear racks are often only available in fixed lengths and standard dimensions. A parametric gear rack allows you to define the exact module, length and dimensions required for your project, making it ideal for replacement parts, prototypes and custom machines.

Download the STL or Order a 3D Print

After configuring your gear rack, you can immediately download the STL file or order a professional 3D print. This makes it easy to manufacture custom rack-and-pinion components without CAD software.

FAQ

Must the gear rack and spur gear have the same module?

Yes. The module must always be identical for proper tooth engagement.

Can I recreate an existing gear rack?

Yes. Measure the key dimensions of your existing rack and enter them into the configurator.

How do I determine the module of an existing gear?

Use our detailed gear measurement guide to calculate the module from the outside diameter and tooth count.

Configure Your Gear Rack Now

Select the correct module, define the required dimensions and create a custom gear rack in just a few minutes.